US5656055A - Sheet shaping press - Google Patents

Sheet shaping press Download PDF

Info

Publication number
US5656055A
US5656055A US08/448,773 US44877395A US5656055A US 5656055 A US5656055 A US 5656055A US 44877395 A US44877395 A US 44877395A US 5656055 A US5656055 A US 5656055A
Authority
US
United States
Prior art keywords
sheet
mold
slots
shaping surface
rolls
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/448,773
Other languages
English (en)
Inventor
Robert G. Frank
Michael T. Fecik
Jean Florean
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vitro SAB de CV
Vitro Flat Glass LLC
Original Assignee
PPG Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PPG Industries Inc filed Critical PPG Industries Inc
Priority to US08/448,773 priority Critical patent/US5656055A/en
Assigned to PPG INDUSTRIES, INC. reassignment PPG INDUSTRIES, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FECIK, MICHAEL T., FRANK, ROBERT G., FLOREAN, JEAN
Priority to IT96MI001024A priority patent/IT1283049B1/it
Priority to FR9606263A priority patent/FR2734561B1/fr
Application granted granted Critical
Publication of US5656055A publication Critical patent/US5656055A/en
Assigned to PPG INDUSTRIES OHIO, INC. reassignment PPG INDUSTRIES OHIO, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PPG INDUSTRIES, INC.
Assigned to PPG INDUSTRIES OHIO, INC. reassignment PPG INDUSTRIES OHIO, INC. CORRECTIVE ASSIGNMENT TO CORRECT INCORRECT PROPERTY NUMBERS 08/666726;08/942182; 08/984387;08/990890;5645767;5698141;5723072;5744070; 5753146;5783116;5808063; 5811034 PREVIOUSLY RECORDED ON REEL 009737 FRAME 0591. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Assignors: PPG INDUSTRIES, INC.
Anticipated expiration legal-status Critical
Assigned to VITRO, S.A.B. DE C.V. reassignment VITRO, S.A.B. DE C.V. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PPG INDUSTRIES OHIO, INC.
Assigned to VITRO, S.A.B. DE C.V. reassignment VITRO, S.A.B. DE C.V. CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE ADDRESS PREVIOUSLY RECORDED AT REEL: 040473 FRAME: 0455. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Assignors: PPG INDUSTRIES OHIO, INC.
Assigned to VITRO FLAT GLASS LLC reassignment VITRO FLAT GLASS LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VITRO, S.A.B. DE C.V.
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
    • C03B23/0305—Press-bending accelerated by applying mechanical forces, e.g. inertia, weights or local forces
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2225/00—Transporting hot glass sheets during their manufacture
    • C03B2225/02—Means for positioning, aligning or orientating the sheets during their travel, e.g. stops

Definitions

  • This invention relates to bending heat-softenable sheet material and in particular to a novel mold configuration that provides consistent shaping of glass sheets.
  • Shaped and tempered glass sheets are widely used as side windows or rear windows in vehicles such as automobiles and the like.
  • flat glass sheets must be shaped to precisely define curvatures dictated by the shape and outline of the frames defined in the window openings into which the glass side or rear windows are installed. It is also important that the rear or side windows meet stringent optical requirements and that the windows be free of optical defects and reflective distortion that would tend to interfere with a clear viewing therethrough in their viewing area.
  • Commercial production of shaped glass sheets for such purposes commonly include heating flat sheets to their heat softening temperature, shaping the heated glass to a desired curvature and cooling the sheets in a controlled manner to a temperature below the annealing range of the glass, to increase the resistance of the glass to breakage.
  • a glass sheet is generally conveyed along a substantially horizontal path through a tunnel-type furnace, heated to its heat softening temperature and transferred into a shaping station adjacent the furnace where a glass sheet is shaped. After shaping, the glass sheet is transferred to a cooling station where it is controllably cooled.
  • the heat-softened glass sheet may be shaped using the variety of bending techniques, which are well known in the art. For example, in U.S. Pat. No. 4,662,925, heat-softened glass sheets are shaped between full surface upper and lower molds. In U.S. Pat. No. 4,830,650, the lower mold is a continuous flexible ring-type mold. In U.S. Pat. Nos., 4,272,274 and 4,518,411, the lower mold includes a number of transversely extending shaping lands with conveying rolls positioned between each land.
  • the present invention provides a ring mold for shaping heat-softenable sheet material.
  • the mold includes peripheral wall members enclosing a central cavity having an open upper end.
  • the wall members have an upper sheet shaping surface with a peripheral shape and elevational contour that generally corresponds to a desired peripheral shape and elevational contour of a sheet to be shaped.
  • a first set of slots are positioned along and extend through portions of one of the wall members and a second set of slots are positioned along and extend through portions of an opposing wall member. Each of the slots in the second set is generally horizontally aligned with a corresponding slot in the first set.
  • a non-marking, heat-resistant material is secured to the sheet shaping surface of said mold and the sheet shaping surface is configured such that the heat-resistant material contacts only a peripheral edge of the sheet to be shaped.
  • Conveying rolls may be positioned within the mold cavity such that each end of a central shaft of the rolls extends through an aligned pair of slots.
  • FIG. 1 is a perspective view of a glass sheet shaping arrangement incorporating the teachings of the present invention, with portions removed for clarity.
  • FIG. 2 is a side elevation of the lower shaping mold illustrated in FIG. 1, showing alternate embodiments of the present invention.
  • FIG. 3 is a sectional view taken along line 3--3 of FIG. 1, showing alternate embodiments of the present invention, with portions removed for clarity.
  • FIG. 4 is a side view similar to FIG. 2 showing an alternate embodiment of the present invention, with portions removed for clarity.
  • FIG. 5 is a sectional view taken along line 5--5 of FIG. 1 showing the upper and lower molds in a closed, sheet shaping arrangement, with portions removed for clarity.
  • the present invention is illustrated with a glass sheet shaping system similar to that disclosed in U.S. Pat. No. 5,286,271, but may be used to shape other heat-softenable sheet material, such as plastics, and with other types of heat-softenable sheet material shaping systems.
  • an apparatus for shaping and heat treating glass sheets includes a tunnel-type furnace 10, a shaping station 12 and a cooling station 14. Glass sheets G are conveyed over a plurality of conveyor rolls 16 and 18 along a generally horizontal path from a loading station (not shown), through the furnace 10 to the shaping station 12 where the heat-softened glass sheet is shaped between an upper vacuum mold 20, of a type well known in the art, and a lower mold 22, which is the subject of the present invention. Vacuum is drawn along downwardly facing sheet shaping surface 24 of upper mold 20 to shape the sheet and hold it thereagainst after shaping. The mold 20 and shaped glass sheet G is then shuttled to a position above a series of transversely shaped conveying rolls 26 at a downstream transfer station 28.
  • the rolls 26 have a transverse elevational curvature that generally corresponds to the transverse curvature of shaping surface 24. Vacuum along surface 24 is terminated and the shaped glass sheet G is deposited onto rolls 26 which, in turn, maintains the glass sheets shape as it is conveyed to the cooling station 14.
  • the cooling station 14 includes a plurality of curved rolls 30 and plenums 32 and 34 which direct cooling fluid through nozzles 36 and 38, respectively, against the opposing major surfaces of the glass sheet G to controllably cool the sheet.
  • the glass sheet G may be transferred onto a tempering ring (not shown) and thereafter moved into a cooling station as disclosed in U.S. Pat. No. 4,830,650.
  • the shaping station 12 includes upper vacuum shaping mold 20 and lower shaping mold 22. If desired, the shaping station may be enclosed and heated.
  • Upper mold 20 is preferably composed of high temperature resistant, rigid material, for example, ceramic, iron, brass or stainless steel, and may be covered with a heat resistant cover 39, such as a glass fiber, aramid or stainless steel cloth.
  • the downwardly facing shaping surface 24 of the mold 20 is shaped to conform with the shape desired for the glass sheet to be shaped.
  • the upper mold 20 is horizontally movable via a shuttling arrangement 40, which may be similar to that disclosed in U.S. Pat. Nos. 4,662,925 and 4,767,434 or the like.
  • the lower mold 22 is preferably a one-piece cast structure with a peripheral wall 42 surrounding a central cavity area 44 with an open upper end. If desired, mold 22 may include a bottom member 45 integral with the walls 42.
  • the mold 22 is cast from a heat-resistant material, for example, aluminum, brass, cast iron, stainless steel or ceramic composite, and is secured to a mounting plate 46, e.g. using mounting bolts or clamps (not shown).
  • the upper surface 48 of walls 42 forms the sheet shaping surface of the lower mold 22 and generally conforms to the desired peripheral shape and elevational contour of the sheet to be shaped.
  • surface 48 may be covered with a non-marking, heat-resistant material 50, such as glass fiber, aramid or stainless steel cloth or pads, which may be secured to the surface 48 by contact cement.
  • a cover 50 When a cover 50 is used, the contour of surface 48 of mold 22 may be compensated to account for the presence of the cover material.
  • the sheet shaping surface 48 of mold 22 is contoured in cross-section so that only the edge 54 of sheet G contacts surface 52 of cover 50.
  • Portion 60 of mold surface 48 is configured such that cover 50 remains below the marginal area 56 of the glass surface after the sheet G has been heated and pressed between upper mold 20 and lower mold 22. It should be appreciated that if a cover 50 is not used, surface 48 would be configured so that only the edge 54 of sheet G contacts surface 48 and portion 60 of surface 48 is spaced below the marginal area 56 of the glass surface after the sheet G has been shaped by upper mold 20 and lower mold 22. By limiting contact between sheet G and surface 52 of cover 50 (or surface 48 of mold wall 42 if cover 50 is not used), the potential for marking of the glass marginal area 56 is reduced.
  • rolls 18 are arranged to support the transverse dimension of the heat-softened glass sheets G as each sheet exits the furnace 10 and enters the shaping station 12.
  • Rolls 18 may be conventional, large diameter rolls with a center drive shaft, as shown in FIGS. 1-4, or a shaft covered with a heat resistant, non-marking fabric sleeve.
  • Slots 62 are positioned in opposing sidewalls 64 and 66 of peripheral wall 42 as shown in FIG. 3 to receive the drive shafts 68 of the rolls 18. More specifically, each slot of a first set of slots in sidewall 64 is aligned with a corresponding slot in a second set of slots in sidewall 66.
  • Each pair of slots 62 receives the drive shaft 68 of one of rolls 18 which are positioned within the outline of mold 22.
  • the rolls 18 are driven in any convenient manner well known in the art (not shown) and are preferably positioned such that the plane along which the glass sheet G is conveyed on rolls 16 through furnace 10 is aligned with the plane along which rolls 18 convey the glass sheet G into the shaping station 12.
  • the slots 62 allow the mold 22 and rolls 18 to move vertically relative to each other, as will be discussed later in more detail.
  • the slots 62 may extend through mold surface 48 as shown in the right side of FIGS. 2 and 3 or may be completely enclosed by the sidewall structure as shown in the left side of FIGS. 2 and 3. In the embodiment of the invention shown in the right side of FIG.
  • material 50 may extend across the opening formed by the slots 62 as shown in FIG. 2, or the slot may remain uncovered.
  • additional shaping members 70 may be inserted within the upper portion of slot 62 and secured to the sidewalls 42, as shown in FIG. 4, to provide a continuous shaping surface 48.
  • mold surface 48 is continuous. It should be appreciated that thin vertical slits (not shown) may be cut through the shaping surface 48 and extend downward through a portion of mold walls 42 to provide expansion relief when the mold 22 is heated to an elevated temperature; however, for the purpose of this invention, the surface 48 would still be considered continuous, especially if cover 50 extends across the slit.
  • mold 22 is moved relative to the rolls 18 by a lifter 72, for example, a pneumatic or electric cylinder.
  • Lifter 72 vertically reciprocates the lower mold 22 from an initial position wherein the sheet shaping surface 48 is positioned below the plane along which support rolls 18 convey the heat-softened glass sheets G into the shaping station 12, to a second position above the support rolls 18 to lift the heat-softened glass sheet G off rolls 18 and toward shaping surface 24 of upper mold 20, as will be discussed later in more detail.
  • the rolls 18 may be moved downwardly below the sheet shaping surface 48 of mold 22 to affect the transfer. Mold 22 would then move upward and/or upper mold 20 would move downward to press the heat-softened glass sheet G therebetween.
  • Alignment members 74 with openings 76 may be positioned about the periphery of mold 22 to receive a pin 78 on upper mold 20.
  • Pin 78 may be a temporary member used to align molds 20 and 22 during an initial set-up operation or it may be used to continuously position molds 20 and 22 during the pressing operation and ensure proper pressing alignment between the molds as shown in FIG. 5.
  • heating coils 84 may be positioned within cavity 44, as shown in FIG. 3, to maintain or provide additional heat to the mold 22 and/or central portions of the glass G during a shaping operation. Depending on the desired heat profile, the heaters 84 may be positioned in either direction within cavity
  • the mold 22 was constructed of 6061 cast aluminum and had a wall 42 and bottom member 45 thickness of approximately 1.25 in. (3.18 cm).
  • Surface 48 was covered with a 0.060 in. (0.15 mm) thick pad 50 of Kevlar® aramid fabric, available from E. I. DuPont de Nemours, Inc., Delaware, and was generally contoured such that surface 52 of pad 50 contacted the peripheral edge 54 of the glass sheet G, and the marginal area 54 of the shaped sheet directly over the inner edge 80 of mold 22 was approximately 0.020 in. (0.50 mm) above a corresponding portion of pad 50.
  • Walls 42 were approximately 10 in. (25.4 cm) high.
  • the slots 62 were 1.25 in.
  • the distance between the marginal area 56 of the glass sheet G directly over inner edge 80 of mold 22 and the corresponding portion of cover 50 was gradually increased along a longitudinal side of the mold 22 from 0.020 in. (0.50 mm) at the opposing ends of the side to 0.030 in. (0.75 mm) at the center of the longitudinal side.
  • each glass sheet G is supported across its width on successive rolls 16 and conveyed through furnace 10 where it is heated to its softening point temperature.
  • the heated glass sheet G then exits the furnace 10 and is conveyed onto rolls 18 in the shaping station 12.
  • the lower mold 22 is initially positioned below the upper conveying surface of support rolls 18 so that the glass sheet G may be conveyed into the shaping station 12 without any interference.
  • lifter 72 moves lower mold 22 upward to contact the edge 54 of the glass sheet G, lifting the glass sheet G off the rolls 18.
  • the movement of sheet G into the shaping station 12 may be slowed or stopped to ensure proper positioning of the sheet G between the molds 20 and 22.
  • the lower mold 22 continues to move upward to press the edge 54 of the heat-softened glass sheet G against upper mold 20. Vacuum is drawn along surface 24 of mold 20 to shape the central portions of the glass sheet G. After shaping, the lower mold 22 is lowered and the shaped glass sheet G is held against upper mold 20 by the vacuum. Shuttling arrangement 40 is actuated to move the upper mold 20 and glass sheet G downstream from the shaping station 12 to the transfer station 28, preferably at a speed on the order of the conveying speed of the transversely shaped conveyor rolls 30.
  • the vacuum along surface 24 is terminated and the shaped glass sheet G is released and dropped a short vertical distance directly onto the rolls 30, which are rotating at the time of transfer, to move the shaped glass sheet to the cooling station 14.
  • the upper vacuum mold 20 stops its downstream motion and returns to its original position within the shaping station 12 to await the arrival of the next glass sheet G.
  • mold 22 presented herein provides several advantages over prior art molds that use a segmented or continuous pressing surface.
  • mold 22's ring configuration contacts only the marginal area of the sheet G, and preferably only the peripheral edge, to eliminate mold marking along the central areas of the lower surface of the sheet G and minimize any marking about the sheet's periphery.
  • surface 48 of the mold 22 may be machined to give the precise contour required to match the corresponding peripheral portions of the upper mold 20 and provide the desired elevational shape for the glass sheet G.
  • the overall structure is more rigid than other bent metal ring configurations and therefore less susceptible to warping and misalignment due to handling.
  • the shape of surface 48 will remain stable over an extended shaping campaign.
  • the shape of a glass sheet G formed by the mold 22 of the present invention is more accurate and is more consistent from shaped sheet to sheet than a continuous or segmented ring, whose shaping surface must be periodically adjusted at each individual support post to maintain proper positioning and configuration with respect to the upper mold 20.
  • the design of the mold 22 may be compensated to account for the anticipated expansion of the mold 22 when placed in a high-temperature environment.
  • the mold 22 may be divided into more than one section. Each section will be more rigid and therefore less susceptible to warping, will expand uniformly and will have a rigid shaping surface that provides consistent sheet shaping over an extended shaping campaign; however, with this particular embodiment of the invention, care must be taken to ensure that the individual sections remain aligned.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
US08/448,773 1995-05-24 1995-05-24 Sheet shaping press Expired - Lifetime US5656055A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US08/448,773 US5656055A (en) 1995-05-24 1995-05-24 Sheet shaping press
IT96MI001024A IT1283049B1 (it) 1995-05-24 1996-05-21 Stampo ad anello per sagomare materiale in lastra termorammollibile
FR9606263A FR2734561B1 (fr) 1995-05-24 1996-05-21 Moule pour le formage d'un materiau en feuille ramollissable par la chaleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/448,773 US5656055A (en) 1995-05-24 1995-05-24 Sheet shaping press

Publications (1)

Publication Number Publication Date
US5656055A true US5656055A (en) 1997-08-12

Family

ID=23781623

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/448,773 Expired - Lifetime US5656055A (en) 1995-05-24 1995-05-24 Sheet shaping press

Country Status (3)

Country Link
US (1) US5656055A (it)
FR (1) FR2734561B1 (it)
IT (1) IT1283049B1 (it)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5857358A (en) * 1996-10-23 1999-01-12 Donnelly Corporation Method and apparatus for bending glass
US5938810A (en) * 1996-10-23 1999-08-17 Donnelly Corporation Apparatus for tempering and bending glass
US6513348B2 (en) 2001-06-19 2003-02-04 Glasstech, Inc. Quench station and method for quenching formed glass sheets
US6543255B2 (en) 2001-06-19 2003-04-08 Glasstech, Inc. Press bending station and method for job switching
US6578383B2 (en) 2001-06-19 2003-06-17 Glasstech, Inc. Apparatus and method for roll bending heated glass sheets
US20050045700A1 (en) * 2003-08-29 2005-03-03 Winter John A. Method of soldering and solder compositions
US20150000339A1 (en) * 2013-06-28 2015-01-01 Samsung Display Co., Ltd. Apparatus for forming a glass

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4272274A (en) * 1978-10-25 1981-06-09 Ppg Industries, Inc. Slotted glass sheet shaping mold
US4496386A (en) * 1984-01-16 1985-01-29 Libbey-Owens-Ford Company Method of and apparatus for bending glass sheets
US4518411A (en) * 1983-09-30 1985-05-21 Ppg Industries, Inc. Shaping glass sheets to complicated shapes using special lift mold
US4589901A (en) * 1984-07-19 1986-05-20 Nippon Sheet Glass Co., Ltd. Apparatus for and method of bending glass sheets
US4606749A (en) * 1984-09-26 1986-08-19 Nippon Sheet Glass Co., Ltd. Apparatus for and method of bending glass sheets
US4662925A (en) * 1985-12-09 1987-05-05 Ppg Industries, Inc. Horizontal press bending of heat softened glass sheets
US4682925A (en) * 1985-04-11 1987-07-28 Usm Corporation Tack strip
US4711654A (en) * 1986-02-03 1987-12-08 Nippon Sheet Glass Co., Ltd. Apparatus for shaping glass sheet
US4749399A (en) * 1986-03-18 1988-06-07 Nippon Sheet Glass Co., Ltd. Ring mold unit for shaping and tempering glass sheet
US4830650A (en) * 1988-01-04 1989-05-16 Ppg Industries, Inc. Flexible ring mold and method of use
US4883526A (en) * 1989-03-30 1989-11-28 Libbey-Owens-Ford Co. Method and apparatus for shaping and conveying glass sheets
US5279635A (en) * 1992-01-08 1994-01-18 Libbey-Owens-Ford Co. Method and apparatus for controlling the temperature of glass sheets in press bending
US5286271A (en) * 1992-07-02 1994-02-15 Ppg Industries, Inc. Method and apparatus for bending glass sheets
US5292356A (en) * 1991-07-19 1994-03-08 Libbey-Owens-Ford Co. Support mechanism for a glass sheet press bending mold

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4272274A (en) * 1978-10-25 1981-06-09 Ppg Industries, Inc. Slotted glass sheet shaping mold
US4518411A (en) * 1983-09-30 1985-05-21 Ppg Industries, Inc. Shaping glass sheets to complicated shapes using special lift mold
US4496386A (en) * 1984-01-16 1985-01-29 Libbey-Owens-Ford Company Method of and apparatus for bending glass sheets
US4589901A (en) * 1984-07-19 1986-05-20 Nippon Sheet Glass Co., Ltd. Apparatus for and method of bending glass sheets
US4606749A (en) * 1984-09-26 1986-08-19 Nippon Sheet Glass Co., Ltd. Apparatus for and method of bending glass sheets
US4682925A (en) * 1985-04-11 1987-07-28 Usm Corporation Tack strip
US4662925A (en) * 1985-12-09 1987-05-05 Ppg Industries, Inc. Horizontal press bending of heat softened glass sheets
US4711654A (en) * 1986-02-03 1987-12-08 Nippon Sheet Glass Co., Ltd. Apparatus for shaping glass sheet
US4749399A (en) * 1986-03-18 1988-06-07 Nippon Sheet Glass Co., Ltd. Ring mold unit for shaping and tempering glass sheet
US4830650A (en) * 1988-01-04 1989-05-16 Ppg Industries, Inc. Flexible ring mold and method of use
US4883526A (en) * 1989-03-30 1989-11-28 Libbey-Owens-Ford Co. Method and apparatus for shaping and conveying glass sheets
US5292356A (en) * 1991-07-19 1994-03-08 Libbey-Owens-Ford Co. Support mechanism for a glass sheet press bending mold
US5279635A (en) * 1992-01-08 1994-01-18 Libbey-Owens-Ford Co. Method and apparatus for controlling the temperature of glass sheets in press bending
US5286271A (en) * 1992-07-02 1994-02-15 Ppg Industries, Inc. Method and apparatus for bending glass sheets

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5857358A (en) * 1996-10-23 1999-01-12 Donnelly Corporation Method and apparatus for bending glass
US5938810A (en) * 1996-10-23 1999-08-17 Donnelly Corporation Apparatus for tempering and bending glass
US6321570B1 (en) 1996-10-23 2001-11-27 Donnelly Corporation Method and apparatus for tempering and bending glass
US6513348B2 (en) 2001-06-19 2003-02-04 Glasstech, Inc. Quench station and method for quenching formed glass sheets
US6543255B2 (en) 2001-06-19 2003-04-08 Glasstech, Inc. Press bending station and method for job switching
US6578383B2 (en) 2001-06-19 2003-06-17 Glasstech, Inc. Apparatus and method for roll bending heated glass sheets
US20050045700A1 (en) * 2003-08-29 2005-03-03 Winter John A. Method of soldering and solder compositions
US7159756B2 (en) 2003-08-29 2007-01-09 Ppg Industries Ohio, Inc. Method of soldering and solder compositions
US20070152019A1 (en) * 2003-08-29 2007-07-05 Winter John A Solder compositions; method of soldering, and a laminated transparency having bus bars
US7617964B2 (en) 2003-08-29 2009-11-17 Ppg Industries Ohio, Inc. Solder compositions; method of soldering, and a laminated transparency having bus bars
US20150000339A1 (en) * 2013-06-28 2015-01-01 Samsung Display Co., Ltd. Apparatus for forming a glass
US9221706B2 (en) * 2013-06-28 2015-12-29 Samsung Display Co., Ltd. Apparatus for forming a glass

Also Published As

Publication number Publication date
ITMI961024A0 (it) 1996-05-21
FR2734561A1 (fr) 1996-11-29
ITMI961024A1 (it) 1997-11-21
FR2734561B1 (fr) 1999-01-22
IT1283049B1 (it) 1998-04-07

Similar Documents

Publication Publication Date Title
US4662925A (en) Horizontal press bending of heat softened glass sheets
CA2141830C (en) Method and apparatus of bending glass sheets
US4197108A (en) Slotted glass sheet shaping mold
EP0228597B1 (en) Shuttling support frame for vacuum pickup
US4746348A (en) Horizontal press bending apparatus and method
US5286271A (en) Method and apparatus for bending glass sheets
US4666492A (en) Method and apparatus for shaping glass sheets
US4297118A (en) Controlling overheating of vacuum mold used to shape glass sheets
EP0677489B1 (en) Bending and tempering glass sheets
US5833729A (en) Method and apparatus for bending glass sheets
KR920003978B1 (ko) 가요성 링 모울드
US4272274A (en) Slotted glass sheet shaping mold
US4277276A (en) Method and apparatus for shaping glass sheets using deformable vacuum mold
KR950031950A (ko) 유리판을 벤딩하여 템퍼링하는 방법 및 장치
US4666493A (en) Sheet positioning system
US4349375A (en) Deformable vacuum mold for shaping glass sheets
JPS6183640A (ja) 板ガラスのプレス成形方法及び装置
US4430110A (en) Shaping sheets of glass or other deformable material to a compound curvature
US4252552A (en) Shaping glass sheets using molds of different shapes
EP0361263B1 (en) In-lehr press bending using pressurized gas
GB2037736A (en) Aligning hot shaped glass sheets on transfer rings
US4483703A (en) Deformable vacuum holder with helical coil springs for shaping glass
US5656055A (en) Sheet shaping press
CA1241198A (en) Vacuum mold for shaping glass sheets
CA1283294C (en) Extended surface pressing mold

Legal Events

Date Code Title Description
AS Assignment

Owner name: PPG INDUSTRIES, INC., PENNSYLVANIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FRANK, ROBERT G.;FECIK, MICHAEL T.;FLOREAN, JEAN;REEL/FRAME:007578/0719;SIGNING DATES FROM 19950707 TO 19950724

STCF Information on status: patent grant

Free format text: PATENTED CASE

AS Assignment

Owner name: PPG INDUSTRIES OHIO, INC., OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PPG INDUSTRIES, INC.;REEL/FRAME:009737/0591

Effective date: 19990204

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12

REMI Maintenance fee reminder mailed
AS Assignment

Owner name: PPG INDUSTRIES OHIO, INC., OHIO

Free format text: CORRECTIVE ASSIGNMENT TO CORRECT INCORRECT PROPERTY NUMBERS 08/666726;08/942182;08/984387;08/990890;5645767;5698141;5723072;5744070;5753146;5783116;5808063;5811034 PREVIOUSLY RECORDED ON REEL 009737 FRAME 0591. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT;ASSIGNOR:PPG INDUSTRIES, INC.;REEL/FRAME:032513/0174

Effective date: 19990204

AS Assignment

Owner name: VITRO, S.A.B. DE C.V., MEXICO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PPG INDUSTRIES OHIO, INC.;REEL/FRAME:040473/0455

Effective date: 20161001

AS Assignment

Owner name: VITRO, S.A.B. DE C.V., MEXICO

Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE ADDRESS PREVIOUSLY RECORDED AT REEL: 040473 FRAME: 0455. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT;ASSIGNOR:PPG INDUSTRIES OHIO, INC.;REEL/FRAME:042393/0520

Effective date: 20161001

AS Assignment

Owner name: VITRO FLAT GLASS LLC, PENNSYLVANIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VITRO, S.A.B. DE C.V.;REEL/FRAME:058052/0526

Effective date: 20161001